Air cleaner



2, 1952 GILMORE 2,620,066

AIR CLEANER Filed Nov. 29, 1946 Patented Dec. 2, 1952 AIR CLEANER.

Harry L. Gilmore, Adrian, Mich, assignor to Aget Manufacturing Company, Adrian, Mich., a corporation of Michigan Application November 29, 1946, Serial No. 712,913

3 Claims.

This invention relates to purifying gases and air, especially as to fine particles or dust.

This invention has utility in salvaging of fine fragments of material which may be thrown into rapidly moving air to be carried away from the machine operation. To this end, in proximity to the abrasion, or other work, a suction intake is located of such capacity that the indrawn air protects the worker from inhaling dust-laden atmosphere from the machine. In many plant operations, spilling of this air volume exterior of the room or building, would require temperature maintaining equipment for warming or cooling the replacement air volume.

Referring to the drawings:

Fig. 1 is a plan view of an embodiment of the invention broken away to show the motor in elevation and the driven blower discharge therefrom in partial horizontal section to a cyclone dust collector for a superposed settling chamber;

Fig. 2 is a side elevation, except that the showing is in vertical section in the region centrally of the cyclone, of the installation of Fig. 1;

Fig. 3 is a perspective fragmentary view looking down on the top and brought forward to a section on the line III-III, Fig. 1, on an enlarged scale, and

Fig. 4 is a detail view on the line IV-IV, Fig. 2, showing the knocker device for shaking off the dust from the filter screen.

A general sheet metal housing structure I, has spaced from its bottom 2 a partition or deck 3 from which rises a pedestal 4 providing a support for a motor 5. A switch 6 in an end wall of the structure I has electrical connections I therefrom to the motor 5.

Directly connected on shaft 8 from the motor 5 is a centrifugal fan or blower 9 in a housing I having a tangential discharge II, a shield back I2 and a seal central packing I3 opposite an intake or suction port I4. Duct branches I may extend from the intake I4, when particle collection for single installation unit is to care for more than one dust laden source.

A drawer l6 having a pull-out handle I7 is removably seated in the structure I below the partition 3 at an opening I8, thru which coarser particles I9 may descend from a taper portion 20 having a sealed connection 2| with the partition 3. The taper or chute portion 2!! is from a cylindrical portion 22. Tangentially of the upper portion of the portion 22, the blower discharge duct II enters, as supplementally directed by a baflle 23. Upwardly, the cylindrical chamber portion 22 is closed by a second deck 24 2 parallel to the deck 3. Concentric with the chamber 22 is a tubular portion 24' from an opening 25 in the deck 24 and extending downwardly therefrom to adjacent the top of the taper portion 20. Particle-carrying air draft 26 entering this cyclone type dust collector from the suction blower 9 by the passage I I may eddy about in the chamber 22 in a sort of helical course downward to draft direction reversal 21 at a lowered flow rate for ascent in the tubular way 24'. This slower lineal travel rate at direction change draft 2! tends to release the heavier particles I9 for dropping thru theopening I8 into the drawer I6. A factor in promoting this gravity separation is a wing member 28, herein shown as quartering the up draft passage thru the tube 24 and extending downward therefrom into the inward taper of the conical wall portion 20. The member 28 thus suppresses any carrying along of the helical swirl from the chamber 22 and makes more abrupt the reversal 27.

The greatly reduced volume of updraft in the passage 24' is in a way of about twice the crosssectional area capacity of the intake [4. However, this updraft entrance into a settling chamber 29, to a minor extent, may be dirty. Accordingly, step is taken against having such thrown thru a mesh wall top 30 into a fibrous mass 3| held by an outer foraminous section 32 in a rectangular frame 33. To this end, one of the wings 28 protrudes into the chamber 29 thru the opening 25 in the deck 24, and in such extension is bowed one way. There is an additional weld attached oppositely bowed portion from the same wing 28. These two bowed portions provide a pair of baffle deflectors 34. The updraft from the way 24' is thus directed laterally away from impinging on the underside of the filter, regardless of the angular placing of the wings 28 in the way 24.

The structure I, parallel to the deck 24, has an inward flange or seat 35 carrying an air seal packing 35 on which rests the frame 33 of the filter top section. The fibrous mass 3| in the top section may be Fiberglas of about thickness and of weight of about 6# per cu. ft. Pull clamps 36 of the trunk type may anchor the filter top in the seat 35. Upon release of the clamps 36, the operator, or the one giving attention to the equipment, may grasp handles 3? and tilt upward, or clear the filter top, and thereby expose the deck 24 for collecting the fines or more minute particles as there accumulated, should there be occasion for so classifying these as separate from the more coarse portions.

3 Should there not be occasion for so classifying, a brush may be used to move this dust off the deck 24 to fall thru the way 26 and the opening I8 into the drawer l6.

Near the switch 8 is a handle 38 on a shaft 38 in bearings 40 below the deck 2 1. At its inward end, the shaft 36 has a knocker or stamp-milllike cam 49 in position to engage offset 4! from a plunger 42, normally upwardly held by a tension helical spring 43. The plunger &2 extends thru an air seal rubber bellows packing 44 from the deck 24 in the chamber 29 to a knocker or plate 45. The guide gasket thru the deck 24 mounts a bracket 46 providing a guide fork ll for the offset 4|. The spring 43 from the offset 4| has its upper end connected to the end of the bracket 46 extending past the gasket at the underside of the deck 24.

During intervals when the unit be not running, the operator may occasionally turn the handle 38 clockwise. This causes the plate 45 to be snapped against the underside of the filter, due to the spring 43. This serves to shake loose from the filter such fine particles as may have lodged thereon. These fine or dust particles accumulate on the deck 24,.and thereby clear the filter for more efiicient operation.

What is claimed and it is desired to secure by Letters Patent is:

1. In a dust collecting and air purifying unit, a frame, a filter chamber having a floor and side and top walls, said floor being in said frame and having an opening, a filter in an open portion of at least one of said walls, a cyclone under said floor with the bottom of said floor secured to the top of the cyclone, said cyclone having an upper cylindrical portion and a lower conical portion, a cylindrical sleeve axially mounted inside said cylindrical portion and connected to said floor opening as the outlet of said cyclone into said chamber, radial fins inside said sleeve and extending downwardly therefrom toward the sides of said conical portion, and a blower located below said floor and discharging into said cyclone.

2. A unit according to claim 1 including means to remove particles collected on said filter.

3. A device according to claim 1 including air current deflector means from said sleeve outlet into said chamber to distribute the air throughout said chamber.

HARRY L. GILMORE.

REFERENCES CITED The following references are of record in the file of this patent: I

UNITED STATES PATENTS McAllister Aug. 20,. 19 1.0v 

